Formation of metal coils



Oct. 7, 1941. 5 R 2,257,760

FORMATION OF METAL QCOILS Filed July 12 1939 s Sheets-Sheet 1 33% flaw/a Oct. 7, 1941. ;'s. NY ERG FORMATION OF METAL COILS Filed July 12, 19393 Sheets-Slfeet 2 Oct. 7, 1941. NYBERG 2,257,760

FORMATION OF METAL 'COILS I Filed July 12, 1939 s sheets-sheet z (Kai/o0 o 137/0 0 o o o {60 6 00 00:00 a0 a0 00 as 00 00 01/35 7 0. '0 0 L 57%Q, g 0

Patented Oct. 7, 1941 2,257,760 FORMATION OF METAL COILS Stone Nyberg,Dover, Ohio, assignor to Agnes J.

Reeves Greer, Morgantown, W. Va.

Application July 12, 1939, Serial No. 284,058 Claims. (01. 153-4) Theinvention relates to the coiling of metal coils preparatory to picklingthe coils and is especially adapted for properly preparing the coils forpickling in pickling machines of the general type disclosed in GreerPatent No. 2,091,921, issued August 31, 1937; Shoemaker Patent No.2,120,843, issued June 14, 1938; and Greer application Serial No.249,484 filed January 5, 1939, now Patent No. 2,196,210, issued April 9,1940; and the present invention pertains to the method and apparatus forforming the coils and to the coils thus formed.

The general type of pickling machines above referred to diifer from thecontinuous strip pickling machines in which the metal is uncoiled andpassed through the pickling machine in strip form, in that the picklingmachines referred to provide means for pickling the coil withoutuncoiling the same, this being accomplished by supporting the coils uponmandrels which suspend the coils in the pickling and washing solutions,the mandrels being rotated in order to rotate the coils within thesolutions.

For this purpose it is necessary that the convolutions of the coils beopened up or separated while in the pickling bath so that none of theconvolutions will remain in contact with each other in the bath, thusgiving the pickling acid free access to every portion of the surfaces ofthe metal, as otherwise the pickled metal will be marred by black spotsor marks where the acid has not had access to the surface of the metal.

In the patents and application above referred to the coil shown is aconventional spiral comprising a continuous curve from the center to theoutside of the coil. This frequently results in two of the convolutionsof a coil contacting with each other for some distance while the coil isin the pickling solution, thus, preventing the acid from properlycontacting the opposed surfaces of these convolutions of the coil andresulting in an improperly pickled coil having black spots upon thesurfaces which are thus not properly exposed to the action of the acid.S

Greer Patent No. 2,191,463 for Method and apparatus for recoiling metalcoils, dated February 2'7, 1940, discloses a method and apparatus forforming coils having projections in the form of angular bends in theconvolutions of the coil to keep the same properly spaced or separatedwhile in the pickling solution, and has been found to work entirelysatisfactorily in use for pickling in machines such as the abovementioned patents.

The present invention is in the nature of an improvement upon oraddition to the disclosure in said Greer Patent No. 2,191,463 andcontemplates the formation of a coil having projections in the form ofbuttons or ribs formed in the convolutions 'of the coil to hold the sameseparated or spaced'from each other, and this invention is applicablenot only to coils to be pickled in machines such as the above mentionedpatents, but may also be used for separating the convolutions of thecoil to be pickled by the old method which is still in use in many smallplants, wherein the convolutions of the coil are separated by short bentrods or hairpins, as they are familiarly called, which are insertedbetween convolutions of the coil which is then placed on end in a tub ortank in which either the coil or pickling acid is agitated.

One object of the invention is to provide a new method and apparatus forforming a metal coil of such shape that none of the convolutions of thecoil will remain in contact with each other.

- Another object is to v provide for the formation of a coil ofcontinuous spiral form excepting for slight projections in the form ofbuttons or ribs formed around each convolution to space adjacentconvolutions therefrom.

A further object is the provision of such a coil in which -theprojections may be irregu- -larly spaced around each convolutionthereof.

A still further object is the provision of such a coil in which theprojections may be oppositely disposed and uniformly spaced throughoutthe length of the metal strip forming the coil whereby when the coil issuspended upon a mandrel the uniformly spaced, oppositely disposedprojections in the convolutions above the mandrel will cooperate witheach other in the manner of gear teeth so as to prevent each convolutionof the coil from moving relative to adjacent convolutions whereby theconvolutions will be prevented from winding or tightening up.

,Another object is the provision 'ofmeans for forming the projections ina metal strip and then winding the formed strip into a substantiallyspiral coil.

A still further object is the provision of a machine for forming theprojections in the coil with means for adjusting the machine so as toprovide projections of any desired shape 'in any desired positionupon'the coil.

The above objects together with others which will be apparent from thedrawings and following description, or which may be later referred ofthe coil to may be attained in the manner illustrated in theaccompanying drawings in which- Figure 1 is a sectional elevation of amachine for forming projections upon a coil in the manner above statedin general terms;

. Fig. 2, a front elevation of the machine shown in Fig. 1;

Fig. 3, a detail perspective view of a portion of one of the rolls ofthe machine showing the manner of connecting the die blocks thereto;

Fig. 4, an elevation of a coil formed in accordance with the inventionshowing the same suspended upon a mandrel;

Fig. 5, a view similar to Fig. 4 showing a different form of projectionsupon the coils;

Fig. 6, a plan view of a portion of an uncoiled strip with projectionsthereon such as shown in the coil of Fig. 4;

Fig. 7, a similar view showing projections such as shown in the coil ofFig. 5;

Fig. 8, a similar view showing projections at opposite side edges of thestrip;

Fig. 9, a similar view showing the projections in the form of buttonsstaggered alternately across the strip;

Fig. 10 asimilar view showing the projections in the form of short ribsstaggered across the strip; and

Fig. 11 a similar view showing the projections in the form of ribsextending transversely across the strip;

Similar numerals refer to throughout the several views.

The metal coil to be recoiled for pickling in accordance withthe'present invention is uncoiled and may be fed through a machine suchas illustrated in Figs. 1 and 2 for forming projections upon the metaland recoiling the same, the projections spacing apart the severalconvolutions of the coil.

The machine .may include spaced housings l within which are journaleda-lower roll II and a cooperating, vertical, adjustable upper roll l2.

These rolls are provided with complemental projections and recessesaround their exteriors for the purpose of forming the projectionsin themetal coil.

In order that projections of any desired shape or kind may be formed inthe coil either through the center thereof or near or at the edges or invarious other arrangements, these projections and recesses upon therolls may be formed upon removable'die blocks 13 adapted to beadjustsimilar parts ably mounted in longitudinal grooves I 4 provided inthe rolls.

As shown in the drawings each of these die blocks may be of dove-tailshape so as to fit the correspondingly inclined side wall l5 of thegroove at one side and the correspondingly shaped side wall l6 of theclamping and retaining strip I! on the other side.

The abutting sides of the die block and strip ll may be serrated as atl8 so as to hold each die block tightly clamped in any desired adjustedposition when the screws I9 are located through the strip I1 and intothe roll as best shown in Fig. 3.

The metal may be fed to the rolls I2 by means of a pair of feedrOlIs 20and for the purpose of breaking or loosening any scale which may bepresent upon the surfaces of the metal a vertically adjustable roll 2|may cooperate with the feed rolls 20.

In order that the upper roll l2 may be vertically adjusted relat to thelower roll 20 to accommodate varying thicknesses of metal, these rollsmay be geared together in the manner shown in Fig. 2 in which shafts 22may be connected as by universal joints 23 to the spin- I Fig. '2 forproducing substantially button-like projections 3| at irregularityspaced intervals throughout the center of the metal 32 in the mannerindicated in Fig. 6. It should be understood that the dies may bearranged to place these button-like projections at uniformly spacedintervals throughout the center of the strip, if desired, or by properlypositioning two die blocks in each groove ll of the rolls H and I2,these projections may be formed near opposite edges of the metal stripand may be either irregularly or uniformly spaced as desired.

In Fig. '7 is shown a portion of a. metal strip in which the projectionsare oppositely disposed as at 33 and 34 so that when the metal isrecoiled to form a coil as indicated generally at 35 in Fig. 5 theoppositely disposed projections 33 and 34 will be arranged throughoutthe convolutions of the coil in the manner illustrated in said figure.

In Fig. 8 is shown the manner in which substantially half-roundprojections 36 may be formed in opposite edges of the metal strip andthese projections may be either uniformly or irregularly spaced, asdesired.

Fig. 9 shows another arrangement of the button-like projections 3|located in staggered arrangement across the metal strip, and Fig. 10

shows a similar arrangement of slightly elongated or rib-likeprojections 31.

If desired, the projections may be in the form of ribs 38 extendingentirely across the strip.

As the projections are formed in the metal strip the same is wound intoa substantially spiral coil upon the drum 39, the projections beinglocated around each convolution of the coil thus formed spacing theconvolutions apart.

The drum 39 may be jourhaled in a suitable bearing upon the standard 43,from which radiate several spokes 44 to the outer portions of which isconnected a concentric semi-cylindric guard plate 45, at one end ofwhich is located the hooked stop 40. I

If desired, the coil may be opened up to any desired extent by engagingthe loose outer end thereof in the stop 40 and rotating the coiling drum39 in reverse direction until the desired result is obtained.

It will be obvious that upon this reverse rotation of the drum thecurved plate 45 will guide the outer end of the coil onto the stop 40,which will hold the outer end of the coil against movement as the drumis rotated in reverse direction, and the guard plate will cooperate withthe stop to limit the expanding movement of the outside of the coilwhile the reverse rotation of the drum will open up the convolutions ofthe coil so that they will be separated from each other whereby relativemovement between adjacent convolutions of the coil will be obtained.

The coil thus produced may then be placed upon a mandrel, indicatedgenerally at H in means for passing a metal strip Fig. 4, in suchposition that the coil is suspended within a pickling tank 42 and themandrel may be rotated by any suitable means for rotating the coilaround the same.

The projections 3| upon each convolution of the coil will thus preventthe several convolutions from contacting with each other while in thepickling solution, thus, permitting free access of the pickling acid tothe entire surfaceof the coil. Should any of the projections 3| contactwith the surfaces of the adjacent convolutions of the coil, due to thetightening of the convolutions caused by rotation upon the mandrel thiswill not prevent the pickling solution from contacting the surface ofthe coil at these points, since the rotation of the coil around themandrel causes a continual movement of the convolutions of the coilrelative to each other and these slight points of contact arecontinuously changing their positions.

The type of oppositely and 34 shown in Figs. 5 and 'I is especiallydesigned to prevent any considerable winding movement or tightening ofthe convolutions of the coil relative to each other.

As illustrated in Fig. 5 this is accomplished by the oppositely disposedprojections of the different convolutions engaging each other in theportion of the coil above the mandrel. The action is somewhat similar toa plurality of ring gears, the downwardly disposed projections-34 ofeach convolution having only in either direction between the upwardlydisposed projections 33 of the next adjacent convolution.

According to the provisions of the patent statutes I have explained theprinciple of my inventionand described one embodiment thereof, but Idesire to have it understood that within the scope of the appendedclaims the invention may be practiced otherwise than as specificallyillustrated and described, the invention residing in the formation ofprojections in the convolutions of the coil to hold the convolutionsspaced from each other in the pickling solution, regardlessof whetherthese projections are of the particular conformation of the projectionsillustrated and 1.'\Means for forming a coil of metal and separating theconvolutions oi the coil, comprising a pair or cooperating rolls,projections on one roll and corresponding depressions in the other roll,through said rolls so as to form projections thereon, a drum locatedbeyond said rolls and having means for receiving the leading end of-.the metal strip, means for rotating the drum in one direction forcoiling the metal thereon to Iorm'a coil the convolutions of which havespaced projections therein, means for rotating the drum in the oppositedirection and means comprising a concentric guard plate and a stopadjacent to the drum for engaging and holding the outer end of the coilagainst movement and producing relative movement between adjacentconvolutions of coil to disposed projections 33 a slight movementseparate the convolutions so that the projections of adjacentconvolutions will be spaced from each other.

2. Means for forming a coil of metal and separating the convolutions ofthe coil, comprising a pair of cooperating rolls, projections on oneroll and corresponding depressions in the other roll, means for passinga metal strip through said rolls so as to form irregularly spacedprojections thereon, a drum located beyond said rolls and having meansfor receiving the leading end of the metal strip, means for rotating thedrum in one direction for coiling the metal thereon to form a coil theconvolutions of which have spaced projections therein, means forrotating the drum in the opposite direction and means comprising aconcentric guard plate and a stop adjacent to the drum for engaging andholding the outer end of the coil against movement and producingrelative movement between adjacent convolutions of coil to separate theconvolutions so that the projections of adjacent convolutions will bespaced from each other.

3. Means for forming a coil of metal and separating the convolutions ofthe coil, comprising a .pair of cooperating rolls, projections on oneroll and corresponding depressions in the other roll, means for passinga metal strip through said rolls so as to form projections upon thecentral portion only thereof, a drum located beyond said rolls andhaving means for receiving the leading end of the metal strip, means forrotating the drum in one direction for coiling the metal thereon to forma coil the convolutions of which have spaced projections therein, meansfor rotating the drum in the opposite direction and means comprising aconcentric guard plate and a stop adjacent to the drum for engaging andholding the outer' end of the coil againstmovement and producingrelative movement between adjacent convolutions of coil to separate theconvolutions so that the projections of adjacent convolutions will bespaced from each other.

4. Means for forming a coil of metal and separating the convolutions ofthe coil, comprising a pair of cooperating rolls, projections on oneroll and corresponding depressions in the other roll, means for passinga metal strip through said rolls so as to form projections upon the edgeportions only thereof, a drum located beyond said rolls and having meansfor receiving the leading end oi! the metal strip, means for rotatingthe drum in one direction for.coiling the metal thereon to form a coilthe convolutions of which have spaced projections therein, means forrotating the drum in the opposite direction and means comprising aconcentric guard plate and a stop adjacent to the drum the outer end ofthe coil against movement and producing relative movement betweenadjacent convolutions of 'coil to separate the convolutions so that theprojections of adjacent convolutions will be spaced from each other. i

5. Means for forming a coil of metal and separating the convolutions ofthe coil, comprising a pair of cooperating rolls, projections on oneroll and corresponding depressions in the other roll, means forpassing ametal strip through said rolls so as to form projections in zig-zagarrangement thereon, a drum located beyond said rolls and having meansfor receiving the leading end of the metal strip, means for rotating thedrum in one direction for coiling the metal thereon.to form a coil theconvoluilons of which have spaced projections therein, means forrotating the drum in the opposite direction and means comprising aconcentric guard plate and a stop adjacent to the drum for engaging andholding the outer end of the coil against movement and producingrelative movement between adjacent convolutions of coil to separate theconvolutions so that the projections of'adjacent convolutions will bespaced from each other.

' STONE NYBEIiG.

for engaging and holding

